Dewey Decimal System Subject Card FIC KEE Keene, Carolyn. Author Card The Clue of the Velvet Mask/ Carolyn Keene. New York, Grosset, 1969c. p. 177. ill.; 24 cm X 18 cm. (Nancy Drew Mysteries) When a gang that uses parties as a cover for robberies victimizes a masquerade party Nancy is attending, the teen-age detective switches identity with her girl friend to solve the case. 1. Mystery and detective stories. 2. Robbery/Fiction. I. Nancy Drew Mystery Series. II. Title Subject Call number Author of the book Title of the Book Place of Publication Publishing Company Number of Pages Year of Publication What is Mental Health? Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act, and helps determine how we handle stress, relate to others, and make choices. Mental health is important at every stage of life, from childhood and adolescence through adulthood. Over the course of your life, if you experience mental health problems, your thinking, mood, and behavior could be affected.